U 986. Génétique et. Wanders R, Kemp S, Mandel JL, Wirth B, Pamplona R, Aubourg P, Pujol A.Valproic acid induces antioxidant effects in X-linked.Valproic acid and its derivatives are commonly used to treat many psychiatric conditions in the elderly. Hyperammonemia is a less common but important side effect.